Firing-chamber for powdered fuel.



W. D. WOOD.

FIRING CHAMBER FOR POWDERED FUEL. APPLICATION FllED Jun: 22. 1916.

Patented Apr. 10, 1917.

' 1.222.344. H p Original application filed Hovember 11, 1815, Serial No. 80,827. Divided and this application filed June 22,

' UNITED STATES PATENT OFFICE.

WALTER D. WOOD, OF ALLENTOWN, PENNSYLVANIA, ASSIGNOB T0 IUE L SAVING COM- Pm, OF LLLENIOWN, PENNSYLVANIA, A CORPORATION 01'! 11 BHNSYLVANIA.

FIRING-CHAMBER Fon' rownnrmn rent.

Specification 6: Letters Patent.

Pate11ted Apr. 10, 1917.

\ I 1918. Serial No. 105,121.

To all whom it may concern.

Be it known that I, \V ALTER D. W001i, a citizen of the United States, and resident of Allentown, in the county of Lehlgh and State of Pennsylvania, have invented certain new and. useful Improvements in Firing-Chambers for Powdered Fuel, of Which the following is a specification, reference be ing had therein to the accompanylng drawing.

My present invention has reference to a fire box or chamber belonging to a locomo ti ve or boiler furnace, or any other kind of a furnace, in connection with which pow.- dcred fuel such as crushed or comminuted coal is used, anl this application is a division of my forxr application for patent on a firing chambc for powdered fuel, filed Noveniliier 11,1915, Serial. No. 60,827, the present application having particular reference to the ci'nistrltlction of the firing chan 1 her. The special objectof the invention 15 to irmarove the construction of the fire box and also to enable the accuimiilations of the products of con'ilmsthm such as the sin resulting from the burning of the powrered file] aiid other refuse materials to be readily and easily removed from the bottom of the of the same on of the iii-inn chamber togetl'ior with the slag pan and a power mechanism for operating the same,

Fig. 4 is a side view of a removable central portion. of one of the fire bricks used in the arch in. the firing chamber;

Fig. 5 is a crosseection of said brick;

F 6 is a plan v low of the same; 4

Fig. 7 a sectional plan view of the slag pan on the line 7, 7 of Fig. 2.

Similar charactm' of reference designate riding; parts throughout the differ ent fi ures of the drawln'f.

group offire tubes Wlllfil'l run through the water space and receive the flame that heats the tubes and thereby lieats the water. In the fire box 1 is an arch 6 which inclined rearwardly and upwardly. It preferably consists of a number, say three, of supporting water tubes 7 which carry bricks seated upon them, there being 1 space 8 left at the rear end of the arch near-the rear head of the boiler so that the fiune underneath the arch will be deflected reamvardly and then upwardly through the opening 8 in the di rection shown by the so rows and then over into thespace above thi. arch, then toward and into the front group of horizontal tubes 5. The bricks which compose the arch (3 may be arranged in any desired manner. I find it convenient to enploy two rows (if such bricks 9, which rov are longitudinally inclined and which rest on the tubes 7, 7 and outside of these two rows are two other rows of bricks 10 which are doubly inclined in position as shown in Fig. 2, one incline provided with openings 11 and 12 which are preferably staggered as shown in Fig. 2 so that the arch may take the form. of a semi-open arch. These openings allow the flame from the fuel to ciurse freely into the upper par-tot the fire box and meet the tubes 5, and also they allow the draft created in the front end of the lo comotive by the exhaust from the stack to pass directly through said openings so that a portion of the flame is drawn directly through the arch, and thus the whole area. of the ire brick is utilized and combustion is increi seal. The staggered openings have sometimes been provided by me by leaving spaces be; veen the bricks, but in the prewnt case I find it more convenient to construct the bricks with the openings formed therein. One of those bricks, as 9, shown in plan. view in Fig. i and in section in Fig. 5, said brick in the opening 11 therein adapted "to be c d, if desired by the inclined plug 13 Si own in Fig. 4. By

providing l:iriclrs,;,hatving inclined openings details of all of which need not be set forth in the present description. Directly above the opening 14 and extending for a certain distance into the fire box is a curved horizontal auxiliary arch 45, the purpose of which is to carry the stream of fuel-laden air farther forward into the firing chamber and thus distribute it-more evenly, and at the same time greatly aid the combustion by reasonof the additional glowing surface presented to the fuel immediately upon its entrance into the tire box. It also tends to prevent the flame from going directly through the opening 8. My improved firing chamber omits the ash pan and other details usually accompanying such a chamber, and thus makes it possible for me to provide the fire box with a depressed auxiliary chamber 15 sheathed with fire bricks, the sides 16 of which chamber slope inwardly and downwardly toward the bottom 17, while the bottom 17 itself inclines forwardly and downwardly, and also the ends 18 of the depressed auxiliary chamber 13 like the sides 16 slope inwardly and downwardly to the sloping bottom '17 of course, these inclinations may be reversed or changedas desired, being governed by the construction of the furnace.

At some suitable point in the bottom, pret' erably near the front end, or wherever it may be best to locate it in order that the flow thcrc= into from the chamber 15 may take place with ease and accuracy, I form an opening 19-beneath which I locate a slag pan 20. Immediately below the opening 1.), said opening is surrounded by a passage, nozzle,

or pipe 21, which is secured to the underside of the bottom 17 in such a manner that it will encircle the opening 19 and will project downwardly below the bottom 17 for a certain distance. The slag pan 20 is made in two sections 22, which together form an oblong or other suitably-shaped box, said sections being pivotally supported at their upper ends so that they may swing toward and away from each -other. toward each other,

their edges meet, and tl'msthe slag pan 20 is closed. \Vhen they swing away from each other, the pan opens so that its contents will discharge. This slag pan receives from the firing chamber through the bottom openinglil any slag or other foreign matter that grate,

- closing the sections VVhenthey swing may form in the process of combustion, since said matter will work to the lowest point in the bottom of the chamber and will drop through said opening and be caught by the slag pan. The pivoting of the upper edges of the sections 22 is preferably accon'lplished by means of rods 23 carried in hearings on the outside of the discharge pipe 21, as shown in Figs. 1 and 2, at a point slightly above the bottom edge of said pipe 21 so that said pipe may discharge its contents into the pan without causing them to come into contact at all with the pivotal hinge or jointat the upper edge of the section 22. It is furthermore to be particularly noted with reference to the shape and construction of the sections 22 that their vcrtical sides 24 are inwardly inclined from bottom to top, while their bottom portions 25 are inwardly and downwardly inclined from the outside walls 24 to the meeting edges of said bottom parts 25, and that the end walls (see Fig. 7) are inclined from the sides 24 to the meeting edges of parts so as to prevent the slag from accumulating in the corners of the pan and to make it easier for the pan contents to be discharged and render it impossible for the slag to adhere to the parts and thus prevent opening. The rods 23 which are rigidly attached to the sections 22 of the dumping pan 20 and are movably discharge spout 21, as already explained, extenda short distance away from the spout and are supported b bearings 26. The ends of the rods 23 are provided with rigid crank arms 27 which are pivoted to links 28 that are likewise. pivoted to the lower end of a piston rod 2!) attached to a piston within a power cylinder 30 receiving steam or air pressure through pipes 31 from some suitable supsupported in bearings on the and thus operating the specified system of leverage for the purpose of opening and closing the sections 22 of the slag pan so as to dump the'contcnts of the same. The con trol of the pressure in pipes 31 is manipulated from the cab or otherwise. dicated this power cylinder simply as one means for furnishing a device of sufficient strength to actuate the parts of the slag pan in dumping and closing the latter, but without any intentionlof being restricted to the use of a cylinder and piston, inasmuch as various other means can be utilized with equal benefit for the same purpose, and I tlu-rcforc. reserve the liberty of opening and of the slag pan by any suitable mechanical or other ower which may be applied in any way desired.

Below the slag pan 20 is a receptacle 32 with an open top into which the slag pan dumps when its hinged sections unclose. This receptacle 32 is suppored from the bottom of the firing chamber in any suitable way, as for instance,'by means of the I have inhangers 33 attached to the firing chamber, and also to the receptacle 32. Receptacle is provided with a movable cover 34 which covers and lincovers an open part of the receptacle. When the receptacle is built with an inclined bottom, as shown in Fig. 2, this cover 34 will be arranged in connection with the open side of the receptacle and is pr0- vided with a lip 45 adapted to overlap the edgof the open side. This cover 34 is sup ported on a rod 35 held in hearings in the wall of the receptacle 32, and said, rod 35 is provided with a crank arm 36 to which is pivoted a link 37 that is likewise pivoted to a bell-crank lever 38 fulcrumedat 46 at some suitable part of the main frame of the firing chamber. Bell-cranki-SB is operated by a. rod 39 having a handle 43 and projecting through the floor 40 of the locomotive cab or any other operating platform, on which platform 40 is a standard 41 to which the operating lever 39 may be connected. by means of a pin 42. By removing the said pin 42 and setting free the operating handle, the engineer or fireman can by laying hold of the handle 43 actuate the bell-crank 38 and open the cover 34 of the receptacle- 32 so that its contents will be readily discharged.

Many changes may be niade in the construction and arrangement of the various parts without exceeding the scope of the invention, and I reserve the liberty of chang ing the operative details asmuch as may be necessary in carrying the invention into actual practice. I a

' Having thus described my invention,"what I claim as new and desire .to secure by Letters Patent, is:

1. The combination of a firing chamber havingv an inlet for receiving the fuel laden vehicle, a. horizontally-projecting auxiliary arch directly above the inlet for the purpose of carrying the fuel into the firing chamber for a certain distance beyond the inlet, an inclined arch having a rear ope'ningwhich is located above said auxiliary arch, said intransverse openings to allow the flame to v pass throu h the arch at certain points, together witi plugs adapted to be placed in said Openings to enable them to be stagge'red or otherwise related as desired.

2. The combination of a firing chamber having an inlet for receiving the fueldaden vehicle, a horinontally projecting auxiliary arch directly above the inlet for the plu" pose of carrying the fuel into the firing chamber for a. certain distance, and an inclined arch ha ing a rear opening which is located above said auxiliary arch, said 'inclined arch being con'iposed of water tubes and series of br'itdi's supported thereon, said' bricks being provided with central openings in order that the arch may thus furnish transverse passages for the flame, and plugs for said openings to enable the openings to be staggered 0] otherwise related as desired.

3. The combination with a firing chamber having a lepressed auxiliary chamber provided with an inlet opening for receiving a. stream of powdered fuel. of a hori' zontally projecting transversely curved arch at the top of. said inlet for guiding the stream of fuel into the tiring chamber for a. short distanic beyond the inlet. and an inclined arch in the firing chan'iber com posed of inviired tubes and series of bricks supported thereon, some of said bricks be ing formed. with central inclined apertures so that the arch may provide transverse passages at certain points for the discharge i of the flame. together with inclined plugs adapted to hrplaced in said apertures so that some will he closed and others opened as desired.

In U'SUIHUH} signature.

whereof I hereunto affix my WALTER D. WOODI 

